Electric-lamp receptacle for electric signs.



F. W. RUBY.

Bumm@ LAMP RBGEPTAULE ma ELEGTEIG SIGNS.

APYLIATIE YILED HAR. 2U, 1908. @@sf Pa'mntad Nov. 24, 1908,

l" UDHCK W. RUBY, OF JACKSON, MIClllGAN.

CERES-All? RE CEPTACLE FOR ,E LE CTRI SIGNS.

Specification of Letters Patent.

Patented Nov. 24, 1908.

Application filed March 20, 1908. Serial No. 22,285

t url/wm it 'may concern.'

it known that l, lnnnnion NV. RUBY, en or the United Estates, residing at ion. 'iu the cennty ot' Jackson and Slate 1n, have invented a new and usen Lamp Receptacle 'tor Electric ich the following is a 4specifica- Ylhis iuveiition has reference to improve` niente: n electric lamp receptacles for elec- 'lo the contraction and expansion of. the

metal to which itis clamped under the action of changes of temperature.

ly the prcseiit invention a porcelain .socket is remitted but the effects of expansion and cciitracti ot' the metal body of upon suc porcelain socket preproviding a receptacle for the s made up of two nesting screw sleeves provided with enacting tlanges arranged to grip opposite faces of thebody of the sign when one oit the ilanges has been passed through suitable orifice in the sign body and the other sleeve has been screwed upon the iii-st. sleeve until both flanges are brought into {i1-in contact with the body of the sign. The sleeves are so proportioned that when sinifh clamping action has been effected a suitably shaped porcelain lamp socket may be .s lwed into the interior ozt the inner sleeve and abut against the inner edges ot the two nested sleeves.

By making' the screw sleeves o'l comparatively sott metal the eii'ects of expansion and contraction will have no serious ctl'ect upon the comparatively frangible porcelain sockel. rlhe structure of the porcelain 1 i l sooner may be lsuch as is usually employed in connection with incandescent electric lanip bulbs except that the exterior of the socket is formed with screw threads adapted to enter the inner one of the two sleeves, and the socket is also provided with a shoulder arranged to seat against those ends of the sleeves remote from the flanges.

llange 5.

The invention will be best understood by a consideration of the following detail description taken in connection with the accompanying drawings forming a part of this specification, `in which drawings,-

Figure l is a central seclion through a portion of the metal body of an electric sign or letter with the sleeves and socket in place and an incai'idcsccnt electric lamp shown inserted in the socket. tive View showing a small portion of the body ot' the electric sign with the sleeves in position to be inserted but in separated relation.

Referring to the drawings, there is shown the body ll ot' an electric sign or letter such as is connnoiily used in electric sign practice. t is to-be understood that this body may be ot' suitable shape and use for the purposes in- Fig. 2 is a perspec` tended. At appropriate points on the body portion l are formed orifices 2 for the introduction of the holding devices for the lamp sockets. These devices consist oi' two sleeves 3 and 4l. The sleeve 3 is formed with screw threads and one end is bent into a' radial y 'lhc sleeve Ll is likewise provided with screw threads and at one end is bent into a radial flange (i. The sleeve 3 is of a size to lit easily but snugly into the orifice 2 and ma y be readily passed through the same until further movement is resisted by the engagement oitl the flange 5 with the face of the sign body l. The sleeve 4. is ot' such eine and suitably threadciil to be screwed upon the sleeve 3 with the rear iace of the body 1 olE the sign, the i'lange 6 engaging the body of the sign innnediately adjacent to the orifice 2. The two sleeves, when in proper relation to the body l with the sleeve 4 screwed upon the sleeve 3, are in iirni clamped relation to the body with the front face of the body of the sign free from projections except for the thickness oi the flange 5, which"-of course may be quite inconsderable. When the sleeve i is properly applied to the sleeve 5 so` that the two sleeves a re in clamped relation lo the sign, thenI those edges of the two sleeves renioieft'rom the flanges 5 and G are the saine distance from the rear face of the body l.

The lamp socket, which, under the coininon practice is made ot porcelain, is\indi cated at T and comprises a threaded neck portion S and a cylindrical or other shaped body portion 9 ot' slightly greater diameter than the neck portion so as to forni a shoulder li),

until its flange G is in engaementl body signs or letters.

"be"noed *plint the porcelain socket is .in no -senscln contact- Witli the incisi body oi' lic which, when elle neck poreion is screwed into the sleeve 3, will abuis against the rear edges of the two sleeves 3, and 4. Under these conditions the freni; edge of the neck 8 is substantieiiyiush with the front of the sleeve 3 and consequently is substantieily flush with the freni: of the sign body. The interior construction of the lamp socket is immeteriei to the present invention sind is nerefore not shown. it may be constructed in accordance Wish any of the usual designs for che purpose. The socket is propcrlyconsti'ucted io receive en incandescenL lomp bulb ll of any approved eype and the curentmay be carried to die lomp through the sockes 7 by the usuel conducting cord l2.

it is customary izo ineke 'elle sign or iet-ier bodies l of such metal as plein iron or gal-- vanized iron, and in such cese the sleeves 3 and e will be mede of a soer nietalsuch as copper, brass or zinc, although by no means con-fined to iiese pereicuicr inecais.

Considering the sign provided with a number of orifices E2 -lirougli a comperosiveiy heavy iron body l and each oriiice being provided 'with e pair of sleeves 3 and e of metal,

,preferably a metal sofiei than iron, then it will be seen that the face of ehe sign is praeticeily free from protubernnces, and espe ciaily ere-there no porcelain parts on the front fece of the sig-'n lible to be injured by the effects of einperature changes upon 'che iron body. 0f course in the structure shown expansion and contrac'gion of the iron body takes place under 4the variations in tempereture, but there is always elasticity enough in the sleeves 3 and il "zo relieve the porcelain soclrel from undue pressure or strains due to the expansion and contraction of the iron body of the sign under the eieygs or" tempereture changes. Furthermore, the present invencion avoids elle use of bols, or screws or other like means for Jche atacliment of sockets to the iron body.

, it is not necessary that the body l should be the body of a sign or leter, but the invention is adapted for use Wherever it is desired *eo attach electric hunp'receptncles or soclrcs under the conditions present in iii/etal Furthermore, is is to sign :my point, andthereforc all dung-er of bre-king the soclec or injuring it in any manner because the expansion or contrection of the iron body is avoided. Furthermore, the bold-cr for the socket consists oi but two pieces coacingto securely clump the iron body between then and to properly receive vthe lamp-receiving socket, the Whole sructure being practically flush with the front of Jbe body l and constituting a rm and waterproof' joint. Xt is also to beV observed that the labor incident sbo the assemstructure, said 'mein bling and insulcion of e. pari, structed es hereinbefore desc to a inininiuzn and the cost of piodnc'ion of the parts which ineke up ehe s'irueure is' also reduced so e minimum.

l. i means snpporin m eieci-ric lmnp sockets in strnclnres iiebie oension and conirecion under the action oi 1. inperetnre changes comprising nien'iber incrodncible beween che socket moin supporting tlie temperatureproclnced mein struc'gure and ign-Arlemp soclzes from ments.

i2. iii ineens for ig i sence iarnp soclres de e ci dnb-, suiating materie?. in s v neizfie pension nndconirecion im .lie-support WeD i' the lamp soclre.

3. A Ineens supporiin oorceiein ele"- :mic lamp sockets in sirnciciie'oic io enmnsion and contre-mien nnder the ecaion oi temperanre changes? comprising i; meitei reeepiecle for the porcelain soclre; introduci ble between tile soeke; and lie mein snpporting structure, said .reccpricie being composed of e ine'mi soi'fer iii-sn strueure and yield 1 "eiieproduced moyenien as io thereby f the strains of such nio A mesnsfcr 'tric lamp soclrcts prising e. rew through the meml supporti to engage one fece 'of 521e sez screw icc 'e adnp ed :so sere sleeve and to en the face thereof by flic i'irsi screw formed of mese'i nieei niej4 5. i ineens for tric lmnp sz elre's 'o fr gli prising two screwv sieeves,

screw upon abe other boili orifice in the inetei body e e nnge engaging corresponding .fece .i the merel ebcn: ine orifice, eneher screwr sleeve adapted .ic be the :liest 

